Tattoo v4 — fitting marks to the Quaternius body (pipeline preview)

The v3 marks looked incomplete because they were generated as free-standing art and 3D-projected onto the body. v4 flips it: we cut the exact UV island of each body part from the model and generate the design inside that silhouette, so ink coverage reaches every edge by construction.

1 · The exact shapes Quaternius uses (UV template, color = body part)

uv_template.png — arms salmon/blue, legs gold/green, torso cream, hands/feet/head separate

baked_body.png — current v3 bake: ink misses island edges, tapers early, seams on inner limbs

2 · Per-part masks cut from the model (white = tattooable skin)

arm_r — shoulder→wrist

arm_l

leg_r — shorts hem→ankle

leg_l

chest — front plate

back — back plate

3 · Gen canvases (GPT Image 2 fills the parchment silhouette edge-to-edge)

arm_r → chiefs-mark

arm_l → iron-spine

leg_r → voyagers-current

leg_l → storm-bearer

chest → star-eye

back → hearth-warmth

4 · Where v3 falls short on the model (why this rework)

sleeve tapers off mid-forearm (sparse design bottom)

bare seam stripes down the inner shins (wrap seam)

chest piece clipped at the sides (planar projection)